import qs from 'qs'
/**
 * @description 发送POST请求,header头部没有Authorization[微信小程序-网络请求]
 * @param {String} url 接口地址
 * @param {Object} pars 参数对象
 * @param {Object} header header参数
 */
export function post(url, pars, header) {
  let head = {}
  Object.assign(head, header || {}, {
    'Content-Type': 'application/x-www-form-urlencoded'
  })
  return new Promise(function(resolve, reject) {
    wx.request({ // 网络请求s
      url: url,
      data: qs.stringify(pars, {
        indices: false
      }),
      method: 'POST', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT
      header: head,
            // dataType: 'json', // 如果设为json,会尝试对返回的数据做一次JSON.parse
            // responseType: 'text', // 设置响应的数据类型,合法值:text,arraybuffer(since 1.7.0)
      success: function(res) { // success网络请求成功
        if (res.statusCode !== 200) { // 开发者服务器返回的 HTTP 状态码
          return reject({
            error: res.data.error,
            error_description: res.data.error_description,
            code: 500
          })
        }
        resolve(res.data)
      },
      fail: function(error) { // fail调用接口失败
        console.error('error:' + JSON.stringify(error))
        return reject({
          error: '网络异常',
          error_description: '网络异常',
          code: 0
        })
      },
      complete: function(res) { // complete

      }
    })
  })
}

/**
 * @description 发送GET请求,header头部没有Authorization[微信小程序-网络请求]
 * @param {String} url 接口地址
 * @param {Object} pars 参数对象
 * @param {Object} header
 */
export function get(url, pars, header) {
  if (pars != null) {
    let query = qs.stringify(pars, {
      indices: false
    })
    if (url.indexOf('?') > 0) { url = url + '&' + query } else { url = url + '?' + query }
  }
  let head = {}
  Object.assign(head, header || {}, { // 设置请求的header,header中不能设置Referer
    'Content-Type': 'application/x-www-form-urlencoded'
  })

  return new Promise(function(resolve, reject) {
    wx.request({ // 网络请求
      url: url,
      data: {},
      method: 'GET', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT
      header: head,
            // dataType: 'json', // 如果设为json,会尝试对返回的数据做一次JSON.parse
            // responseType: 'text', // 设置响应的数据类型,合法值:text,arraybuffer(since 1.7.0)
      success: function(res) { // success网络请求成功
        if (res.statusCode != 200) { // 开发者服务器返回的 HTTP 状态码
          reject({
            error: res.data.error,
            error_description: res.data.error_description,
            code: 500
          })
          return
        }
        resolve(res.data)
      },
      fail: function(error) { // fail调用接口失败
        reject({
          error: '网络异常',
          error_description: '网络异常',
          code: 0
        })
      },
      complete: function(res) { // complete

      }
    })
  })
}

/**
 * @description 生成签名
 * @param {Object} data 数据
 * @param {String} client_secret 客户端密钥
 */
function buildSign(data, client_secret) {
  var keys = []
  for (let key in data) {
    keys.push(key)
  }
  keys = keys.sort()
  var query = ''
  for (var i = 0; i < keys.length; i++) {
    var v = data[keys[i]]
    if (keys[i].indexOf('_') === 0 || typeof v === 'undefined' || v === '') { continue }
    if (v instanceof Array) {
      for (var j = 0; j < v.length; j++) {
        query += '&' + keys[i] + '=' + v[j]
      }
    } else {
      query += '&' + keys[i] + '=' + v
    }
  }
  return md5(query.substr(1) + client_secret)
}

/**
 * @description md5加密
 * @param {String} string 字符串
 */
function md5(string) {
  var rotateLeft = function(lValue, iShiftBits) {
    return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits))
  }

  var addUnsigned = function(lX, lY) {
    var lX4, lY4, lX8, lY8, lResult
    lX8 = (lX & 0x80000000)
    lY8 = (lY & 0x80000000)
    lX4 = (lX & 0x40000000)
    lY4 = (lY & 0x40000000)
    lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF)
    if (lX4 & lY4) return (lResult ^ 0x80000000 ^ lX8 ^ lY8)
    if (lX4 | lY4) {
      if (lResult & 0x40000000) return (lResult ^ 0xC0000000 ^ lX8 ^ lY8)
      else return (lResult ^ 0x40000000 ^ lX8 ^ lY8)
    } else {
      return (lResult ^ lX8 ^ lY8)
    }
  }

  var F = function(x, y, z) {
    return (x & y) | ((~x) & z)
  }

  var G = function(x, y, z) {
    return (x & z) | (y & (~z))
  }

  var H = function(x, y, z) {
    return (x ^ y ^ z)
  }

  var I = function(x, y, z) {
    return (y ^ (x | (~z)))
  }

  var FF = function(a, b, c, d, x, s, ac) {
    a = addUnsigned(a, addUnsigned(addUnsigned(F(b, c, d), x), ac))
    return addUnsigned(rotateLeft(a, s), b)
  }

  var GG = function(a, b, c, d, x, s, ac) {
    a = addUnsigned(a, addUnsigned(addUnsigned(G(b, c, d), x), ac))
    return addUnsigned(rotateLeft(a, s), b)
  }

  var HH = function(a, b, c, d, x, s, ac) {
    a = addUnsigned(a, addUnsigned(addUnsigned(H(b, c, d), x), ac))
    return addUnsigned(rotateLeft(a, s), b)
  }

  var II = function(a, b, c, d, x, s, ac) {
    a = addUnsigned(a, addUnsigned(addUnsigned(I(b, c, d), x), ac))
    return addUnsigned(rotateLeft(a, s), b)
  }

  var convertToWordArray = function(string) {
    var lWordCount
    var lMessageLength = string.length
    var lNumberOfWordsTempOne = lMessageLength + 8
    var lNumberOfWordsTempTwo = (lNumberOfWordsTempOne - (lNumberOfWordsTempOne % 64)) / 64
    var lNumberOfWords = (lNumberOfWordsTempTwo + 1) * 16
    var lWordArray = Array(lNumberOfWords - 1)
    var lBytePosition = 0
    var lByteCount = 0
    while (lByteCount < lMessageLength) {
      lWordCount = (lByteCount - (lByteCount % 4)) / 4
      lBytePosition = (lByteCount % 4) * 8
      lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition))
      lByteCount++
    }
    lWordCount = (lByteCount - (lByteCount % 4)) / 4
    lBytePosition = (lByteCount % 4) * 8
    lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition)
    lWordArray[lNumberOfWords - 2] = lMessageLength << 3
    lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29
    return lWordArray
  }

  var wordToHex = function(lValue) {
    var WordToHexValue = '',
      WordToHexValueTemp = '',
      lByte, lCount
    for (lCount = 0; lCount <= 3; lCount++) {
      lByte = (lValue >>> (lCount * 8)) & 255
      WordToHexValueTemp = '0' + lByte.toString(16)
      WordToHexValue = WordToHexValue + WordToHexValueTemp.substr(WordToHexValueTemp.length - 2, 2)
    }
    return WordToHexValue
  }

  var uTF8Encode = function(string) {
    string = string.replace(/\x0d\x0a/g, '\x0a')
    var output = ''
    for (var n = 0; n < string.length; n++) {
      var c = string.charCodeAt(n)
      if (c < 128) {
        output += String.fromCharCode(c)
      } else if ((c > 127) && (c < 2048)) {
        output += String.fromCharCode((c >> 6) | 192)
        output += String.fromCharCode((c & 63) | 128)
      } else {
        output += String.fromCharCode((c >> 12) | 224)
        output += String.fromCharCode(((c >> 6) & 63) | 128)
        output += String.fromCharCode((c & 63) | 128)
      }
    }
    return output
  }

  var x = Array()
  var k, AA, BB, CC, DD, a, b, c, d
  var S11 = 7,
    S12 = 12,
    S13 = 17,
    S14 = 22
  var S21 = 5,
    S22 = 9,
    S23 = 14,
    S24 = 20
  var S31 = 4,
    S32 = 11,
    S33 = 16,
    S34 = 23
  var S41 = 6,
    S42 = 10,
    S43 = 15,
    S44 = 21
  string = uTF8Encode(string)
  x = convertToWordArray(string)
  a = 0x67452301
  b = 0xEFCDAB89
  c = 0x98BADCFE
  d = 0x10325476
  for (k = 0; k < x.length; k += 16) {
    AA = a
    BB = b
    CC = c
    DD = d
    a = FF(a, b, c, d, x[k + 0], S11, 0xD76AA478)
    d = FF(d, a, b, c, x[k + 1], S12, 0xE8C7B756)
    c = FF(c, d, a, b, x[k + 2], S13, 0x242070DB)
    b = FF(b, c, d, a, x[k + 3], S14, 0xC1BDCEEE)
    a = FF(a, b, c, d, x[k + 4], S11, 0xF57C0FAF)
    d = FF(d, a, b, c, x[k + 5], S12, 0x4787C62A)
    c = FF(c, d, a, b, x[k + 6], S13, 0xA8304613)
    b = FF(b, c, d, a, x[k + 7], S14, 0xFD469501)
    a = FF(a, b, c, d, x[k + 8], S11, 0x698098D8)
    d = FF(d, a, b, c, x[k + 9], S12, 0x8B44F7AF)
    c = FF(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1)
    b = FF(b, c, d, a, x[k + 11], S14, 0x895CD7BE)
    a = FF(a, b, c, d, x[k + 12], S11, 0x6B901122)
    d = FF(d, a, b, c, x[k + 13], S12, 0xFD987193)
    c = FF(c, d, a, b, x[k + 14], S13, 0xA679438E)
    b = FF(b, c, d, a, x[k + 15], S14, 0x49B40821)
    a = GG(a, b, c, d, x[k + 1], S21, 0xF61E2562)
    d = GG(d, a, b, c, x[k + 6], S22, 0xC040B340)
    c = GG(c, d, a, b, x[k + 11], S23, 0x265E5A51)
    b = GG(b, c, d, a, x[k + 0], S24, 0xE9B6C7AA)
    a = GG(a, b, c, d, x[k + 5], S21, 0xD62F105D)
    d = GG(d, a, b, c, x[k + 10], S22, 0x2441453)
    c = GG(c, d, a, b, x[k + 15], S23, 0xD8A1E681)
    b = GG(b, c, d, a, x[k + 4], S24, 0xE7D3FBC8)
    a = GG(a, b, c, d, x[k + 9], S21, 0x21E1CDE6)
    d = GG(d, a, b, c, x[k + 14], S22, 0xC33707D6)
    c = GG(c, d, a, b, x[k + 3], S23, 0xF4D50D87)
    b = GG(b, c, d, a, x[k + 8], S24, 0x455A14ED)
    a = GG(a, b, c, d, x[k + 13], S21, 0xA9E3E905)
    d = GG(d, a, b, c, x[k + 2], S22, 0xFCEFA3F8)
    c = GG(c, d, a, b, x[k + 7], S23, 0x676F02D9)
    b = GG(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A)
    a = HH(a, b, c, d, x[k + 5], S31, 0xFFFA3942)
    d = HH(d, a, b, c, x[k + 8], S32, 0x8771F681)
    c = HH(c, d, a, b, x[k + 11], S33, 0x6D9D6122)
    b = HH(b, c, d, a, x[k + 14], S34, 0xFDE5380C)
    a = HH(a, b, c, d, x[k + 1], S31, 0xA4BEEA44)
    d = HH(d, a, b, c, x[k + 4], S32, 0x4BDECFA9)
    c = HH(c, d, a, b, x[k + 7], S33, 0xF6BB4B60)
    b = HH(b, c, d, a, x[k + 10], S34, 0xBEBFBC70)
    a = HH(a, b, c, d, x[k + 13], S31, 0x289B7EC6)
    d = HH(d, a, b, c, x[k + 0], S32, 0xEAA127FA)
    c = HH(c, d, a, b, x[k + 3], S33, 0xD4EF3085)
    b = HH(b, c, d, a, x[k + 6], S34, 0x4881D05)
    a = HH(a, b, c, d, x[k + 9], S31, 0xD9D4D039)
    d = HH(d, a, b, c, x[k + 12], S32, 0xE6DB99E5)
    c = HH(c, d, a, b, x[k + 15], S33, 0x1FA27CF8)
    b = HH(b, c, d, a, x[k + 2], S34, 0xC4AC5665)
    a = II(a, b, c, d, x[k + 0], S41, 0xF4292244)
    d = II(d, a, b, c, x[k + 7], S42, 0x432AFF97)
    c = II(c, d, a, b, x[k + 14], S43, 0xAB9423A7)
    b = II(b, c, d, a, x[k + 5], S44, 0xFC93A039)
    a = II(a, b, c, d, x[k + 12], S41, 0x655B59C3)
    d = II(d, a, b, c, x[k + 3], S42, 0x8F0CCC92)
    c = II(c, d, a, b, x[k + 10], S43, 0xFFEFF47D)
    b = II(b, c, d, a, x[k + 1], S44, 0x85845DD1)
    a = II(a, b, c, d, x[k + 8], S41, 0x6FA87E4F)
    d = II(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0)
    c = II(c, d, a, b, x[k + 6], S43, 0xA3014314)
    b = II(b, c, d, a, x[k + 13], S44, 0x4E0811A1)
    a = II(a, b, c, d, x[k + 4], S41, 0xF7537E82)
    d = II(d, a, b, c, x[k + 11], S42, 0xBD3AF235)
    c = II(c, d, a, b, x[k + 2], S43, 0x2AD7D2BB)
    b = II(b, c, d, a, x[k + 9], S44, 0xEB86D391)
    a = addUnsigned(a, AA)
    b = addUnsigned(b, BB)
    c = addUnsigned(c, CC)
    d = addUnsigned(d, DD)
  }
  var tempValue = wordToHex(a) + wordToHex(b) + wordToHex(c) + wordToHex(d)
  return tempValue.toLowerCase()
}

/**
 * @description 发送参数进行特定规则封装的POST请求[微信小程序-网络请求]
 * @param {String} url 请求地址
 * @param {String} method 请求方式
 * @param {String} version api接口版本号
 * @param {String} client_id 客户端id
 * @param {String} client_secret 客户端密钥
 * @param {Object} pars 携带参数
 */
export function postApi(url, method, version, client_id, client_secret, pars) {
  pars['client_id'] = client_id
  pars['timestamp'] = new Date().getTime()
  pars['method'] = method
  pars['version'] = version
  pars['_sign'] = buildSign(pars, client_secret)
  return new Promise(function(resolve, reject) {
    wx.request({ // 网络请求
      url: url,
      data: qs.stringify(pars, {
        indices: false
      }),
      method: 'POST', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT
      header: { // 设置请求的header,header中不能设置Referer
        'Content-Type': 'application/x-www-form-urlencoded'
      },
            // dataType: 'json', // 如果设为json,会尝试对返回的数据做一次JSON.parse
            // responseType: 'text', // 设置响应的数据类型,合法值:text,arraybuffer(since 1.7.0)
      success: function(res) { // success网络请求成功
        if (console.group) {
          console.group('post')
          console.log(url + '?' + qs.stringify(pars, {
            indices: false
          }))
          console.log(res.data)
          console.groupEnd()
        }
        if (res.statusCode != 200) { // 开发者服务器返回的 HTTP 状态码
          reject({
            error: '服务器繁忙,请稍后重试',
            error_description: '服务器繁忙,请稍后重试',
            code: 500
          })
          return
        }
        resolve(res.data)
      },
      fail: function(error) { // fail调用接口失败
        console.error('error:' + JSON.stringify(error))
        reject({
          error: '网络异常',
          error_description: '网络异常',
          code: 0
        })
      },
      complete: function(res) { // complete

      }
    })
  })
}
